Đáp án:
$\rm \dfrac{A}{B}=\dfrac{17}{13}$
Giải thích các bước giải:
`=>text(A)=34/7.13+51/13.22+85/22.37+68/37.49`
`=>(text(3A))/17=6/7.13+9/13.22+15/22.37+8/37.49`
`=>(text(3A))/17=1/7-1/13+1/13-1/22+1/22-1/37+1/37-1/49`
`=>(text(3A))/17=1/7-1/49`
`=>(text(3A))/17=6/49`
`=>text(3A)=6/49*17`
`=>text(3A)=102/49`
`=>text(A)=102/49:3`
`=>text(A)=34/49`
`=>text(B)=39/7.16+65/16.31+52/31.43+26/43.49`
`=>text(3B)/13=9/7.16+15/16.31+12/31.43+6/43.49`
`=>text(3B)/13=1/7-1/16+1/16-1/31+1/31-1/43+1/43-1/49`
`=>text(3B)/13=1/7-1/49`
`=>text(3B)/13=6/49`
`=>text(3B)=6/49*13`
`=>text(3B)=78/49`
`=>text(B)=78/49:3`
`=>text(B)=26/49`
`=>`$\rm\dfrac{A}{B}=\dfrac{\dfrac{34}{49}}{\dfrac{26}{49}}=\dfrac{17}{13}$
Vậy `(text(A))/(text(B))=17/13`.
